1. Explain how the atmosphere helps sustain life on Earth.
Answers
Answer:
The atmosphere also protects living things on Earth from the sun's harmful ultraviolet radiation. ... The atmosphere also helps to sustain life of Earth. It provides oxygen for humans and animals to breathe, and carbon dioxide for plants.
The atmosphere can also affect us in negative ways. Most of the natural catastrophes that occur are due to phenomena in the atmosphere. Things like hurricanes, lightning and thunderstorms, hail, flooding, and tornadoes. Severe consequences can also occur when humans pollute the atmosphere, such as creating smog or destroying ozone. These kinds of things can cause illnesses and even cancer.
Protection
The atmosphere blocks out harmful rays from the sun. The ozone layer, which lies in the stratosphere 11 to 50 kilometers from the Earth's surface, blocks out many harmful forms of radiation. Without the ozone layer, ultraviolet rays would destroy most life on Earth. Gases in the atmosphere also hold in heat. The Earth's average temperatures would fall below the freezing point of water without atmospheric gases to hold enough heat. The balance between blocked radiation and radiation allowed to reach the Earth makes life possible.
Other Benefits
The atmosphere contains a large amount of nitrogen. Some plants take nitrogen straight from the air and use it to build nutrients needed for growth. Atmospheric wind erodes land so it can be broken down to form life-sustaining soil.
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Answer:
Atmosphere is the main reason for life on earth because only earth's atmosphere contains oxygen, carbon dioxide and many other gases. Since there is no atmosphere in moon no life is known to exist there. A simple atmosphere is also no enough to live because even though venus has atmosphere it major component is carbondioxide which is nearly 97%, here humans cannot lead their life, that is why it is said that atmosphere in earth helps sustain life on earth.
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